US 12,009,597 B2
Metamaterial antenna array with isolated antennas and ground skirt along the perimeter
Attila Zólomy, Budapest (HU); Ádám Süle, Budapest (HU); Daniel Simon, Budapest (HU); Kiruba Sankaran Subramani, Austin, TX (US); Terry Lee Dickey, Pflugerville, TX (US); and Jeffrey Tindle, Austin, TX (US)
Assigned to Silicon Laboratories Inc., Austin, TX (US)
Filed by Silicon Laboratories Inc., Austin, TX (US)
Filed on Jun. 2, 2022, as Appl. No. 17/830,536.
Application 17/830,536 is a continuation in part of application No. 17/356,853, filed on Jun. 24, 2021, granted, now 11,611,152.
Prior Publication US 2022/0416439 A1, Dec. 29, 2022
Int. Cl. H01Q 21/06 (2006.01); H01Q 9/04 (2006.01); H01Q 15/00 (2006.01)
CPC H01Q 21/065 (2013.01) [H01Q 9/045 (2013.01); H01Q 15/0086 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An antenna array, comprising:
a plurality of antenna unit cells, wherein each antenna unit cell comprises:
a top surface, comprising a patch antenna and a ground guard ring surrounding the patch antenna;
a reactive impedance surface (RIS) layer disposed beneath the top surface, wherein the RIS layer comprises metamaterial structures; and
a ground layer disposed beneath the RIS layer, wherein vias electrically connect the ground guard ring to the ground layer;
wherein a ground skirt surrounds a perimeter of the antenna array on the top surface, and wherein additional vias electrically connect the ground skirt to the ground layer.